Numerical study of the mixing efficiency of a batch mixer

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Numerical study of the mixing efficiency of a batch mixer ...

2016-11-1  A batch mixer with double-axial mixing was used to simulate and validate the granular flow. The cylindrical batch mixer (with casing dimensions of 100 mm, 100 mm, and 100 mm in the x-, y-, and z-directions, respectively) has two blades (67 mm × 3 mm × 20 mm), which are attached to the back of the cylinder as illustrated in Fig. 1.It can be seen that there are small

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Numerical study of the mixing efficiency of a batch mixer ...

In this study the simulations of granular flow in a batch mixer with independent double axial mixing are presented. The simulated granular flows were used to analyze the mixing efficiency. Such analysis has not been conducted previously for such a batch mixer, because of the complex mixing conditions.

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Numerical study of the mixing efficiency of a ribbon mixer ...

Such simulations are important to analyze mixing efficiency but they have not been conducted previously in a ribbon mixer, owing to complex boundary conditions. The simulations in this study use the discrete element method (DEM) with a wall boundary model based on a

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Studies of Mixing Efficiency in Batch and Continuous Mixers

1994-7-1  Abstract. In this paper we have reviewed some of the results of 3-D, isothermal flow simulations for batch and continuous mixers. The flow patterns were obtained by using FIDAP, a fluid dynamics analysis package based on the finite element method. The problem of time dependent flow boundaries due to the rotations of the rotors in the Banbury ...

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Efficient batch-mode mixing and flow patterns in a ...

2016-8-23  Numerical study. Mixing investigation is performed for four types of chambers illustrated in Fig. 3.The first chamber (Fig. 3a) does not feature any obstacle or baffle and is referred to as “simple” chamber throughout the text. In the second kind of chamber, a pair of baffles are designed with the aim of flow agitation, which is referred to as “baffled” chamber

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EXPERIMENTAL AND NUMERICAL ANALYSIS OF

2020-1-8  mixing in a batch mixer. This paper aims to fill this gap in the literature. The purpose of this paper was to numerically and experimentally examine the effect of chaotic flow on the mixing of a highly viscous fluid and reducing the time and energy necessary for achieving the required homogeneous mixing. In our previous study (Shirmohammadi and ...

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Comparative study of internal batch mixer such as cam ...

2011-6-15  The internal batch mixer investigated in this work is a Haake Polylab and the isometric views are shown in Fig. 4.The geometrical parameter of the dual-lobed cavity mixing chamber was 39 mm in diameter and 80 mm in length with total mixing capacity of 75 g with respect to density of water.Series of two dimensional simulations that neglect the flow along

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[PDF] Flow and mixing performance in helical ribbon

Abstract This paper explores the effect of impeller design on the chaotic mixing in a helical ribbon mixer. Numerical simulations using the smoothed particle hydrodynamics (SPH) method are used to solve for the fluid flow around the moving impellor. The mixing flow is visualised by extracting the hyperbolic Lagrangian coherent structures (LCS) of the flow from the finite-time Lyapunov

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Experimental and Numerical Study of Rhomboidal Mixing

To compare mixing sections, also of different types, without direct testing, it is necessary to have a calculable measure of mixing efficiency. The mixing efficiency analysis can, however, be ...

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Numerical studies of mixing of ellipsoidal particles in a ...

2021-12-9  The mixing of ellipsoids with a wide range of aspect ratios in a bladed mixer has not been investigated. Besides, the role of frictions in ellipsoids mixing in a bladed mixer is interesting but still unknown. Therefore, in this study, DEM is employed to investigate the role of particle shapes and friction coefficients on the mixing of granular ...

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Numerical Investigation of the Mixing Efficiency of the ...

Study of the design of mixing equipment is aimed at achieving optimal mixing of the material, providing guidelines for scale-up and comparison of batch and continuous process equipment.

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JFFHMT - Numerical Analysis of Mixing Performance of a ...

2021-8-3  Figure 4. Comparison between experimental efficiency reported by M. Nimafar et al. [24] and numerical efficiency of the present study for H mixer. Now the comparison of numerical mixing efficiency and pressure drop between H mixer and Y-U 0 mm mixer is presented in Figure 5. It is evident that the efficiency of the Y-U 0 mm mixer is higher and ...

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SciELO - Brasil - EXPERIMENTAL AND NUMERICAL

experimental and numerical analysis of chaotic advection as an efficient approach to maximize homogeneous laminar mixing in a batch mixer F. Shirmohammadi Islamic Azad University, Yadegar-e-Imam Khomeini (RAH) Shahre Rey Branch, Department of

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Concrete Mixing Methods and Concrete Mixers: State of

2001-4-1  Mixing is a complicated process that is affected by the type of mixer, the mixing cycle as defined by the duration, the loading method, and the energy of mixing. There are two main types of mixers: batch and continuous. In each type there are several configurations. The efficiency of a mixer is determined by the homogeneity of the concrete ...

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Numerical Assessment of In-Line Rotor–Stator Mixers in ...

2020-8-12  A similar study was conducted experimentally by Dybalska et al. in a larger water tank in batch mode, with their mixer labeled RH corresponding to mixer A in this study.23 Of interest in their work was the uniformity of the mixing below the mixer, as delimited by alumina powder patterns on the tank floor. The RH mixer performed worse in their ...

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[PDF] Flow and mixing performance in helical ribbon

Abstract This paper explores the effect of impeller design on the chaotic mixing in a helical ribbon mixer. Numerical simulations using the smoothed particle hydrodynamics (SPH) method are used to solve for the fluid flow around the moving impellor. The mixing flow is visualised by extracting the hyperbolic Lagrangian coherent structures (LCS) of the flow from the finite-time Lyapunov

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Design of rotor for internal batch mixer and mixing ...

Mixing is the key component of polymer processing to achieve homogeneity of final product. Previous researchers have reported poor mixing performance of internal batch mixer (IBM) and twin screw extruder (TSE) due to improper distributive and dispersive mixings. This leads to poor product properties. Hence to overcome the problem, this research aims to design a rotor and

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Effect of viscosity on the mixing efficiency in a self ...

One special self-agitation reactor, which does not require a mechanical mixer or other equipment for mixing, has been introduced. Self-agitation is affected by variation in viscosity property. To obtain and research the effect of viscosity on mixing behavior in the self-agitation reactor, Fluent® was used to create numerical simulations and to ...

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Numerical simulation of granular mixing in static mixers ...

2019-6-19  A static mixer is a fidelity engineered device for the continuous mixing of fluid/solid materials. To meet the requirements for mixing purpose, a proper design of the static mixer is important. In this study, we proposed various designs of static mixer based on the blade geometry. Six blade patterns including four twisted blades, four elliptical blades and other four

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Flow physics and mixing quality in a confined impinging ...

In the present study, the mixing performance of a commonly used cylindrical CIJM is examined by direct numerical simulations. Analysis of the simulation results indicates that the interaction of the shear layer with the inner walls of the CIJM is critical in inducing a range of instabilities in the impinging jet flow.

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(PDF) Comparative study of internal batch mixer such as ...

Overviews of mixing efficiency with respect to Length of stretch, instantaneous efficiency and time averaged efficiency are explained in the Table 3. 5. Conclusions: 1. The effects of the plug flow and mixing angle are especially evident in the distributive

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Numerical Investigation of the Mixing Efficiency of the ...

Study of the design of mixing equipment is aimed at achieving optimal mixing of the material, providing guidelines for scale-up and comparison of batch and continuous process equipment.

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Numerical Analysis of Mixing Performance of a Novel ‘Y

2021-8-3  is also studied in order to validate the numerical model. Proposed Y-U mixers offer better mixing performance than H mixer regardless of Reynolds numbers. The Y-U mixers show more than 90% efficiency at low Reynolds numbers (𝑅 ≤1) and efficiency is about 60% for Reynolds numbers from 10 to 50.

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Experimental and numerical study of mixing characteristics ...

2016-1-27  A combined experimental and computational study on a rectangular lobed mixer is performed. A series of simulations based on a steady Reynolds-averaged Navier-Stokes Simulation (RANS) are conducted to analyse the mixing mechanisms of large-scale streamwise structure shed by the trailing edge of lobed mixer, with emphasis being placed on the effect of

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Effect of viscosity on the mixing efficiency in a self ...

One special self-agitation reactor, which does not require a mechanical mixer or other equipment for mixing, has been introduced. Self-agitation is affected by variation in viscosity property. To obtain and research the effect of viscosity on mixing behavior in the self-agitation reactor, Fluent® was used to create numerical simulations and to ...

Get price

Numerical simulation of granular mixing in static mixers ...

2019-6-19  A static mixer is a fidelity engineered device for the continuous mixing of fluid/solid materials. To meet the requirements for mixing purpose, a proper design of the static mixer is important. In this study, we proposed various designs of static mixer based on the blade geometry. Six blade patterns including four twisted blades, four elliptical blades and other four

Get price

EXPERIMENTAL AND NUMERICAL STUDIES ON MIXING OF

2013-3-20  The agitation efficiency is governed by the proper design of this mixing system. In this study, the effects of the central impeller speed, anchor impeller speed, operation mode, and the speed ratio of an anchor-Scaba coaxial impeller were evaluated on its power consumption, mixing time, and flow pattern using electrical resistance tomography ...

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An Effective Mixing for Lithium Ion Battery Slurries

2014-7-29  mixing time and improve the mixing efficiency. The performance of a mixer can be examined either theoreti-cally by numerical simulation of the flow field [26] or experimentally by using a flow visualization technique and rheological measurements [27] [28]. In the present study, a new three-dimensional mixing device was designed for electrode ...

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Flow physics and mixing quality in a confined impinging ...

In the present study, the mixing performance of a commonly used cylindrical CIJM is examined by direct numerical simulations. Analysis of the simulation results indicates that the interaction of the shear layer with the inner walls of the CIJM is critical in inducing a range of instabilities in the impinging jet flow.

Get price

Static Mixer Designs and Applications - ROSS Mixers

2020-4-3  of elements improves mixing efficiency but also leads to a higher pressure loss. LPD vs. LLPD Design When the available pressure drop is limited, an LPD mixer with a larger diameter than the process piping can be selected. The larger mixer housing is inserted into the existing line using appropriate adaptors.

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